Remove tests for deprecated Options UI

chrome/browser/ui/webui/options/options_browsertest.h

-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CHROME_BROWSER_UI_WEBUI_OPTIONS_OPTIONS_BROWSERTEST_H_
-#define CHROME_BROWSER_UI_WEBUI_OPTIONS_OPTIONS_BROWSERTEST_H_
-
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "chrome/test/base/web_ui_browser_test.h"
-#include "content/public/browser/web_ui_message_handler.h"
-
-// This is a helper class used by options_browsertest.js to feed the navigation
-// history back to the test.
-class OptionsBrowserTest : public WebUIBrowserTest,
-                           public content::WebUIMessageHandler {
- public:
-  OptionsBrowserTest();
-  ~OptionsBrowserTest() override;
-
- protected:
-  // Clears the preference at the given |path|.
-  void ClearPref(const char* path);
-
- private:
-  // WebUIMessageHandler implementation.
-  void RegisterMessages() override;
-
-  // WebUIBrowserTest implementation.
-  content::WebUIMessageHandler* GetMockMessageHandler() override;
-
-  // A callback for the 'optionsTestReportHistory' message, this sends the
-  // URLs in the "back" tab history, including the current entry, back to the
-  // WebUI via a callback.
-  void ReportHistory(const base::ListValue* list_value);
-
-  // A callback for the 'optionsTestSetPref' message. The first argument should
-  // be a pref path (e.g., "profile.managed_users"); the second, the new value
-  // to set for that pref.
-  void HandleSetPref(const base::ListValue* args);
-
-  DISALLOW_COPY_AND_ASSIGN(OptionsBrowserTest);
-};
-
-#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_OPTIONS_BROWSERTEST_H_